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    <title>Document</title>
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    <script>
        function Star(uname, age) {
            this.uname = uname
            this.age = age
        }
        Star.prototype = {
            constructor: Star,
            movies: function () {
                console.log('我会唱歌');
            },
            sing: function () {
                console.log('我会演电影');
            }
        }
        var ldh = new Star('刘德华', 18)
        console.log(ldh.__proto__);// Star.prototype
        console.log(Star.prototype.__proto__ === Object.prototype);//true
        console.log(Object.__proto__);//
        console.log(Star.prototype.__proto__.__proto__);//null
        console.log(Star.prototype.__proto__.constructor);//Object
    </script>
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